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Bile acid malabsorption (BAM), known also as bile acid diarrhea, is a cause of several gut-related problems, the main one being chronic diarrhea.It has also been called bile acid-induced diarrhea, cholerheic or choleretic enteropathy, bile salt diarrhea or bile salt malabsorption.
The disequilibrium caused by these changes often causes withdrawal when the long-term use of a drug is discontinued. Upregulation and downregulation can also happen as a response to toxins or hormones. An example of upregulation in pregnancy is hormones that cause cells in the uterus to become more sensitive to oxytocin.
Excitotoxicity can occur from substances produced within the body (endogenous excitotoxins).Glutamate is a prime example of an excitotoxin in the brain, and it is also the major excitatory neurotransmitter in the central nervous system of mammals. [14]
TRPV1 is said to contribute to autophagy of microglia via its Ca 2+-signalling, which leads to mitochondria-induced cell death. The TRPV1 channel also influences microglia-induced inflammation. Migration and chemotaxis of microglia and astrocytes seems to be affected by TRPV1's interaction with the cytoskeleton and Ca 2+-signalling.
Ursodeoxycholic acid (UDCA), also known as ursodiol, is a secondary bile acid, produced in humans and most other species from metabolism by intestinal bacteria.It is synthesized in the liver in some species, and was first identified in bile of bears of genus Ursus, from which its name derived. [8]
Colestyramine is also used in the control of other types of bile acid diarrhea. The primary, idiopathic form of bile acid diarrhea is a common cause of chronic functional diarrhea, often misdiagnosed as diarrhea-predominant irritable bowel syndrome (IBS-D), and most of these patients respond to colestyramine. [4]
In cell biology, there are a multitude of signalling pathways. Cell signalling is part of the molecular biology system that controls and coordinates the actions of cells.. Akt/PKB signalling pathway
In 17–60% of people, the cause of inappropriate antidiuresis is never found. [2] ADH is derived from a preprohormone precursor that is synthesized in cells in the hypothalamus and stored in vesicles in the posterior pituitary. Appropriate ADH secretion is regulated by osmoreceptors on the hypothalamic cells that synthesize and store ADH.